Global and local priors, and the location of lesions using gamma-camera imagery
- 15 December 1991
- journal article
- Published by The Royal Society in Philosophical Transactions A
- Vol. 337 (1647) , 323-342
- https://doi.org/10.1098/rsta.1991.0128
Abstract
After a brief review of the paradigm of bayesian image restoration, we pose the question: If high-level prior information is available and usable, what is lost by modelling at the pixel level instead? Our discussion is based on a real application where this question is relevant: the use of gamma-camera imagery in the location of lesions. Procedures using `global' prior information in the form of a structural model for the image are compared with those using more conventional `local' priors, modelling only interactions among neighbouring pixels. We address in detail physical modelling and algorithms, and present results with both real and simulated data.Keywords
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